Washing machine



FIG. 1 is a front, right perspective view of a washing machine, showing my new design;

FIG. 2 is a front, left perspective view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a rear view thereof; and,

FIG. 6 is a top view thereof. 

The original, ornamental design for a washing machine, as shown and described. 